Actually, if the Yaesu FT3DR has the "MARS Mod" than it will transmit out-of-band like a Baofeng.
The MARS/CAP mod is a really bad idea. The radio is not type accepted by NTIA for use on CAP frequencies. CAP partly uses
P25 and is narrow banded. Even if you are a member of CAP you can't use this radio. MARS is another story. However, you need to be registered with the military and meet certain requirements. I sincerely doubt that very many hams are members of MARS anymore. The main function was doing HF phone patches. Satellites have made that service obsolete to a large degree.
The radio has wide receive coverage so the mod doesn't buy you anything there. Aside from NTIA the radio is not type accepted for any other service either. What's the point?
A friend of mine had modified his two meter radio and was a rail fan. He started doing an ARES net on the Union Pacific road frequency once. I don't think they heard him because he didn't have the correct PL. This is an example of why not to do this mod.
In short you have no legal reason for doing this and, if you don't, there are no worries about transmitting out of band.